Calculator



FIG. 1 is a perspective view of a calculator;

FIG. 2 is a perspective view in opened position thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a right elevational view thereof;

FIG. 7 is a rear side elevational view thereof; and,

FIG. 8 is a bottom plan view thereof.

The ornamental design for a calculator, as shown and described.